📚 Year 7 CCEA Computing: Core Concepts Review | Year 7 CCEA 计算机：核心知识点梳理
In Year 7, the CCEA Computing curriculum introduces students to the fundamentals of digital technology, computational thinking, and responsible use of computers. This article provides a clear and structured review of the core knowledge points, covering topics from basic hardware to programming with Scratch and data representation. Use this guide to consolidate your understanding and prepare for assessments.
在七年级，CCEA 计算机课程向学生介绍数字技术、计算思维和负责任地使用计算机的基础知识。本文对核心知识点进行了清晰、有条理的梳理，涵盖从基础硬件到 Scratch 编程和数据表示等主题。利用本指南巩固理解，为评估做好准备。
1. Introduction to Computing and Digital Literacy | 计算机与数字素养导论
Computing is not just about using a computer; it is about understanding how digital systems work and how to create with technology. Digital literacy means being able to find, evaluate, and communicate information safely and responsibly using a range of tools.
计算机不仅关乎使用电脑，更关乎理解数字系统如何工作以及如何用技术进行创造。数字素养意味着能够使用多种工具安全、负责任地查找、评估和传播信息。
In the CCEA curriculum, you will explore the four main strands: digital citizenship, computational thinking, creating with digital technology, and understanding computer networks. Developing these skills helps you become a confident and ethical user of technology.
在 CCEA 课程中，你将探索四大主线：数字公民、计算思维、用数字技术创造以及理解计算机网络。培养这些技能有助于你成为自信且合乎道德的技术使用者。
2. Understanding Hardware and Software | 了解硬件和软件
Every computer system is made up of two essential components: hardware and software. Hardware refers to the physical parts you can touch, while software is the set of instructions that tells the hardware what to do.
每个计算机系统都由两个基本部分组成：硬件和软件。硬件指可以触摸的物理部件，而软件是指告诉硬件做什么的指令集。
A simple way to remember the difference is: hardware is the body, software is the brain. Without software, hardware is just a collection of electronic components with no purpose.
一个简单的记忆方法是：硬件是身体，软件是大脑。没有软件，硬件只是一堆没有目的的电子元件。
| Hardware Examples | Software Examples |
|---|---|
| Monitor, keyboard, motherboard, CPU, RAM | Operating system, web browser, Scratch, word processor |
中文对照：硬件示例包括显示器、键盘、主板、中央处理器、内存；软件示例包括操作系统、网络浏览器、Scratch、文字处理器。
3. Input, Output, and Storage Devices | 输入、输出和存储设备
Devices connected to a computer can be grouped by their function: input devices send data into the computer, output devices show or present results, and storage devices keep data for later use. Understanding these categories helps you design systems and troubleshoot problems.
连接到计算机的设备可按功能分组：输入设备将数据发送到计算机，输出设备显示或呈现结果，存储设备保存数据以备后用。理解这些类别有助于你设计系统和排查问题。
Common input devices include a keyboard, mouse, touchscreen, and microphone. Output devices include a printer, speakers, and monitor. Storage devices can be internal, like a hard drive, or portable, like a USB flash drive.
常见的输入设备包括键盘、鼠标、触摸屏和麦克风。输出设备包括打印机、扬声器和显示器。存储设备可以是内部的（如硬盘），也可以是便携的（如 U 盘）。
- Input: webcam, scanner, game controller
- Output: headphones, projector, braille display
- Storage: SSD, SD card, cloud storage
输入：网络摄像头、扫描仪、游戏手柄；输出：耳机、投影仪、盲文显示器；存储：固态硬盘、SD 卡、云存储。
4. Computer Networks and the Internet | 计算机网络与互联网
A computer network is formed when two or more devices are connected to share resources and communicate. The internet is a global network of networks that uses standard protocols to transfer data. In Year 7, you will learn the difference between a local area network (LAN) and a wide area network (WAN).
当两个或更多设备连接起来共享资源并进行通信时，就形成了计算机网络。互联网是一个全球性的网络之网络，使用标准协议传输数据。在七年级，你将学习局域网和广域网的区别。
A LAN typically covers a small area like a school or home, while a WAN connects devices over a large geographic distance, such as the internet itself. Network hardware includes routers, switches, and network cables or Wi-Fi access points.
局域网通常覆盖较小区域，如学校或家庭；而广域网连接远距离设备，比如互联网本身。网络硬件包括路由器、交换机和网线或无线接入点。
Understanding how data travels in packets and how IP addresses work is part of the networking basics. Every website you visit has an IP address, but we usually use easier-to-remember domain names.
理解数据如何以数据包形式传输以及 IP 地址如何工作是网络基础知识的一部分。你访问的每个网站都有一个 IP 地址，但我们通常使用更容易记忆的域名。
5. E-Safety and Responsible Use | 电子安全与负责任使用
E-safety means staying safe online by protecting your personal information, recognising potential risks, and behaving respectfully towards others. The CCEA curriculum places strong emphasis on responsible digital citizenship from Year 7 onwards.
电子安全是指通过保护个人信息、识别潜在风险以及尊重他人来确保上网安全。CCEA 课程从七年级起就高度重视负责任的数字公民意识。
Key principles include: never share passwords, think before you post, report cyberbullying, and be careful when downloading files or clicking links. A strong password should contain a mix of letters, numbers, and symbols.
关键原则包括：绝不分享密码、发布前先思考、举报网络欺凌、下载文件或点击链接时要小心。强密码应包含字母、数字和符号的组合。
Your digital footprint—the trail of data you leave online—can affect your future reputation. Always ask a trusted adult if something feels wrong, and use privacy settings to control who sees your content.
你的数字足迹——你在网上留下的数据痕迹——可能影响未来的声誉。如果感觉不对，一定要咨询可信任的成年人，并使用隐私设置来控制谁能看到你的内容。
6. Introduction to Algorithms and Computational Thinking | 算法与计算思维入门
An algorithm is a step-by-step set of instructions to solve a problem or complete a task. You use algorithms daily, from following a recipe to getting ready for school. In computing, algorithms must be precise and unambiguous.
算法是解决问题或完成任务的逐步指令集。你每天都在使用算法，从遵循食谱到准备上学。在计算机中，算法必须精确且无歧义。
Computational thinking involves four key techniques: decomposition (breaking a problem into smaller parts), pattern recognition (spotting similarities), abstraction (focusing on important information only), and algorithm design (creating the step-by-step plan). These skills help you tackle complex challenges logically.
计算思维涉及四种关键技术：分解（将问题拆分成更小的部分）、模式识别（发现相似之处）、抽象（只关注重要信息）和算法设计（创建分步计划）。这些技能帮助你逻辑地应对复杂挑战。
Flowcharts are a common way to represent algorithms visually. Symbols like ovals for start/end, parallelograms for input/output, rectangles for processes, and diamonds for decisions make the logic clear.
流程图是表示算法的常见可视化方式。用椭圆表示开始/结束，平行四边形表示输入/输出，矩形表示处理过程，菱形表示判断，使逻辑清晰。
7. Basics of Programming with Scratch | Scratch 编程基础
Scratch is a block-based visual programming language that lets you create interactive stories, games, and animations. It’s an ideal tool for Year 7 students to learn coding concepts without worrying about syntax errors.
Scratch 是一种基于积木的可视化编程语言，可让你创建交互式故事、游戏和动画。它是七年级学生学习编程概念的理想工具，无需担心语法错误。
The three fundamental programming constructs you will practise are sequence (performing steps in order), selection (making decisions using if…then…else), and iteration (repeating code with loops). Events, such as clicking the green flag, trigger code to run.
你将练习的三种基本编程结构是：顺序（按顺序执行步骤）、选择（使用 if…then…else 做判断）和迭代（用循环重复代码）。事件（如点击绿旗）触发代码运行。
In Scratch, you can move sprites, change costumes, play sounds, and keep scores using variables. For example, a simple banana-catching game might increase a score variable every time the sprite touches a banana. Debugging is an important skill: finding and fixing errors in your program.
在 Scratch 中，你可以移动角色、切换造型、播放声音并使用变量计分。例如，一个简单的接香蕉游戏可以在每次角色碰到香蕉时增加分数变量。调试是一项重要技能：查找并修复程序中的错误。
8. Data Representation: Binary and Beyond | 数据表示：二进制及更多
Computers store all data—numbers, text, images, sound—as patterns of 0s and 1s called binary. Each 0 or 1 is a bit, and 8 bits make up a byte. Understanding binary helps you grasp how computers process information at the most basic level.
计算机将所有数据——数字、文本、图像、声音——存储为由 0 和 1 组成的模式，称为二进制。每个 0 或 1 是一个比特（位），8 个比特组成一个字节。理解二进制有助于你掌握计算机在最基本层面如何处理信息。
A binary number works on a base‑2 system, where each column represents a power of 2. For example, the binary number 1011 represents (1 × 2³) + (0 × 2²) + (1 × 2¹) + (1 × 2⁰) = 8 + 0 + 2 + 1 = 11 in decimal.
二进制数采用基数为 2 的系统，每一列代表 2 的幂。例如，二进制数 1011 表示 (1 × 2³) + (0 × 2²) + (1 × 2¹) + (1 × 2⁰) = 8 + 0 + 2 + 1 = 十进制 11。
| Power of 2 | 2³ | 2² | 2¹ | 2⁰ |
|---|---|---|---|---|
| Value | 8 | 4 | 2 | 1 |
中文对照：2 的幂分别为 8、4、2、1。二进制 1011 放在这些位上得到 8+0+2+1=11。
You may also learn how characters are represented using ASCII code, where each letter or symbol is assigned a binary number. Pixels in an image and sample rates in audio are other examples of digital representation.
你可能还会学习如何使用 ASCII 码表示字符，每个字母或符号分配一个二进制数。图像中的像素和音频中的采样率是数字表示的其他例子。
9. Graphics and Multimedia | 图形与多媒体
Digital graphics can be bitmap (raster) or vector. Bitmap images are made up of a grid of tiny squares called pixels, while vector images use mathematical formulas to describe lines and shapes. Bitmaps can lose quality when enlarged, but vectors stay sharp.
数字图形可以是位图（栅格）或矢量图。位图图像由称为像素的微小方格网格组成，而矢量图像使用数学公式描述线条和形状。位图放大时可能损失质量，但矢量图保持清晰。
You will use software to create and edit graphics, perhaps for a multimedia presentation or a website. Understanding resolution (pixels per inch) and colour depth helps you choose the right format for different purposes.
你将使用软件创建和编辑图形，也许用于多媒体演示或网站。理解分辨率（每英寸像素数）和颜色深度有助于你针对不同目的选择正确的格式。
Multimedia combines text, images, audio, and video. In Year 7, you may plan and produce a short animation or a digital poster, considering audience, purpose, and copyright. Always credit sources and use royalty‑free media when possible.
多媒体结合了文本、图像、音频和视频。在七年级，你可能会策划并制作一个简短的动画或数字海报，考虑受众、目的和版权。始终标注来源，并尽可能使用免版税的媒体素材。
10. Problem Solving and Project Work | 问题解决与项目工作
Throughout the year, you will apply computing skills to real‑world problems. This often involves following the development cycle: analyse the problem, plan a solution, create a digital artefact, test and evaluate it. Reflection is key to improving your work.
整个学年中，你将把计算机技能应用于实际问题。这通常涉及遵循开发周期：分析问题、规划解决方案、创建数字制品、测试并评估。反思是改进工作的关键。
For example, you might design a simple educational game in Scratch. First, you state what the game should do (specification), then you sketch a design, build the code, and finally test it with classmates. Gathering feedback helps you refine the product.
例如，你可能在 Scratch 中设计一个简单的教育游戏。首先，你说明游戏应该做什么（规格说明），然后绘制设计草图，构建代码，最后与同学一起测试。收集反馈有助于你完善产品。
Keeping a project diary or digital portfolio allows you to track your progress and showcase your learning. Remember that making mistakes is part of the process—debugging is just another step in problem solving.
保留项目日志或数字作品集让你可以追踪进展并展示学习成果。记住犯错是过程的一部分——调试只是解决问题的另一个步骤。
Published by TutorHao | Computing Revision Series | aleveler.com
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